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The advantage of 'drip' coffee makers shown in the text is that ______.
A.they are much more economic
B.they can produce only one cup
C.they are more convenient and easier to operate
D.they are more economical

A.A.they
B.they
C.they
D.they

【参考答案】

D
解析：细节题。通过题干回到文章中相应的位置可知答案。见文章第二段第三句：Since many people ......

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The word 'it' in Line 3, Para 3 probably refers to ______.A.the lidB.coffee -makerC.the brewing processD.the model
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In science the meaning of the word 'explain' suffers with civilization's every step in search of reality. Science cannot really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their nature no more is known to the modern scientist than to Thales who first looked into the nature of the electrification of amber, a hard yellowish-brown gum. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces 'really' arE.Electricity, Bertrand Russell says, 'is not a thing, like St. Paul's Cathedral; it is a way in which things behavE.When we have told how things behave when they are electrified, and under what circumstances they are electrified, we have told all there is to tell.' Until recently scientists would have disapproved of such an ideA.Aristotle, for example, whose natural science dominated Western thought for two thousand years, believe that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can deduce that objects fall to the ground because that's where they belong, and smoke goes up because that's where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of controlled experiment which now forms the basis of scientific investigation.The aim of controlled scientific experiments is ______.A.to explain why things happenB.to explain how things happenC.to describe self-evident principlesD.to support Aristotelian science
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